DIN EN 4263:2014
Aerospace series - Heat resisting alloy FE-PA4901 (X12CrNiCoMoW21-20) - As forged - Forging stock - a or D <= 200 mm - 690 MPa <= R m <= 960 MPa; German and English version EN 4263:2013

DIN EN 4263:2014 Referenced Document

EN 2043:2013 Aerospace series - Metallic materials - General requirements for semi-finished product qualification (excluding forgings and castings)
EN 4258:1998 Aerospace series - Metallic materials - General organization of standardization - Links between types of EN standards and their use
EN 4500-003:2012 Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 003: Specific rules for heat resisting alloys